What is this poem???

Question

Okay, so I used to have a copy of some poem, I can't remember who it was by, or what it was called, but I remember parts of the poem:

The best were called, were called to war
Were called to do the Nation's chore
To sacrifice their youth, their lives
And lose their health in National strife

I don't really remember any more, but can anyone tell me who this is by, or what it is called, or ANYTHING???

Ok, it wasn't either of the two poems already suggested, although I appreciate the help. It was about Vietnam, but I really can't remember any of the rest of it. The stanza I put in the question is a direct quote from it, and it's not by Frost. Please help?

Answer 1

Provide more details. You sure it was not Frost!

The land was ours before we were the land's.
She was our land more than a hundred years
Before we were her people. She was ours
In Massachusetts, in Virginia,
But we were England's, still colonials,
Possessing what we still were unpossessed by,
Possessed by what we now no more possessed.
Something we were withholding made us weak
Until we found out that it was ourselves
We were withholding from our land of living,
And forthwith found salvation in surrender.
Such as we were we gave ourselves outright
(The deed of gift was many deeds of war)
To the land vaguely realizing westward,
But still unstoried, artless, unenhanced,
Such as she was, such as she would become.

-- Robert Frost

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Answer 2

When we were called
We answered
When we were called
We went

To help an ailing nation
To help a friend in need
And stop the spread of communism
And help control its spread

At first we were seen as heroes
The defender of the planet
At first we were supported
In the war and how we ran it

But then the horrors were discovered
The terror recounted every day
The people of this nation changed
Their minds at our dismay

For we were sent to do a job
Although our hands were bound
We did our best, we met the challenge
But in the end, the job - undone

We fought, we died and we were maimed,
We returned to our home in utter shame
No heroes welcome were we given
No one but us were to be blamed

But time has passed and minds have changed
And in some discourse, we are seen as hero
But the pain of rejection still lies in our hearts
From a time when we were meeting the foe

As time does pass by
I am sure we will transfigure
The hardness developed
From the treatment so cruel

When we were called we answered
When we were called we went
And if I had to repeat the chore
I do it again, do it once more